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  • Research Article
  • Open Access

Unequal Weighting for Improved Positioning in GPS-Less Sensor Networks

  • 1Email author,
  • 1,
  • 1 and
  • 1
EURASIP Journal on Advances in Signal Processing20072008:281635

  • Received: 17 November 2006
  • Accepted: 8 October 2007
  • Published:


Positioning can be done by means of triangulation in which triples of position-aware nodes estimate a neighbor's position with the help of distances. If a larger number of nodes exist, multiple position estimates can be averaged to yield a more precise mean position. Rather than applying equal weights to each position estimate, we propose an unequal weighting scheme which emphasizes those summands in the averaging process that are more reliable than others. We will show that significant improvements of the overall estimate can be achieved, given that additional information about the error variance of a contributing estimate is known. A major advantage of the approach is that the precision of existing positioning systems can be improved without technical modifications.


  • Information Technology
  • Sensor Network
  • Quantum Information
  • Error Variance
  • Equal Weight

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Authors’ Affiliations

Applied Computer Science IV, University of Mannheim, A5, Mannheim, 6-68159, Germany


© Thomas Haenselmann et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.